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Related Experiment Videos

Converting Sendai virus into a specific fusogen whose cell target can be selected.

O Martinez, J Kimura, C Henry

    Experimental Cell Research
    |September 1, 1986
    PubMed
    Summary

    Researchers created antibody-avidin hybrids to redirect Sendai virus (SV) fusion activity. This targeted delivery system harnesses viral fusion for precise macromolecule delivery into specific cells.

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    Area of Science:

    • Virology
    • Immunology
    • Bioconjugation

    Background:

    • Sendai virus (SV) possesses hemagglutinin-neuraminidase (HN) glycoproteins crucial for cell fusion and viral entry.
    • Monoclonal antibodies targeting HN can block viral agglutination and fusion.
    • Avidin-biotin interactions offer a versatile platform for molecular conjugation.

    Purpose of the Study:

    • To develop covalent hybrids of Fab anti-HN monoclonal antibody and avidin.
    • To investigate the ability of these conjugates to block and redirect SV fusion activity.
    • To assess the potential of this approach for targeted delivery applications.

    Main Methods:

    • Preparation and characterization of Fab anti-HN: avidin covalent conjugates.
    • Incubation of SV with the Fab anti-HN: avidin conjugate.

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  • Assessing cell-cell fusion mediated by modified SV with biotin-labeled target cells.

    • Main Results:

    • Fab anti-HN: avidin conjugates successfully blocked normal SV agglutination.
    • Modified SV fused only biotin-labeled target cells, demonstrating redirected specificity.
    • Achieved cell-cell fusion levels were comparable to those with unmodified SV.

    Conclusions:

    • It is feasible to block the natural cell recognition of SV's HN molecules.
    • A new, specific cell recognition feature can be introduced without compromising viral fusogenicity.
    • This strategy enables harnessing SV fusion for targeted delivery of macromolecules into selected cells.